src/cmd_nick.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include <string>
  18 #include <vector>
  19 #include "inspircd_config.h"
  20 #include "configreader.h"
  21 #include "hash_map.h"
  22 #include "users.h"
  23 #include "modules.h"
  24 #include "commands.h"
  25 #include "xline.h"
  26 #include "dnsqueue.h"
  27 #include "dns.h"
  28 #include "helperfuncs.h"
  29 #include "hashcomp.h"
  30 #include "commands/cmd_nick.h"
  31
  32 extern ServerConfig* Config;
  33 extern int MODCOUNT;
  34 extern std::vector<Module*> modules;
  35 extern std::vector<ircd_module*> factory;
  36 extern time_t TIME;
  37
  38 void cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
  39 {
  40         char oldnick[NICKMAX];
  41
  42         if (pcnt < 1)
  43         {
  44                 log(DEBUG,"not enough params for handle_nick");
  45                 return;
  46         }
  47         if (!parameters[0])
  48         {
  49                 log(DEBUG,"invalid parameter passed to handle_nick");
  50                 return;
  51         }
  52         if (!parameters[0][0])
  53         {
  54                 log(DEBUG,"zero length new nick passed to handle_nick");
  55                 return;
  56         }
  57         if (!user)
  58         {
  59                 log(DEBUG,"invalid user passed to handle_nick");
  60                 return;
  61         }
  62         if (!user->nick)
  63         {
  64                 log(DEBUG,"invalid old nick passed to handle_nick");
  65                 return;
  66         }
  67         if (irc::string(user->nick) == irc::string(parameters[0]))
  68         {
  69                 /* If its exactly the same, even case, dont do anything. */
  70                 if (!strcmp(user->nick,parameters[0]))
  71                         return;
  72                 /* Its a change of case. People insisted that they should be
  73                  * able to do silly things like this even though the RFC says
  74                  * the nick AAA is the same as the nick aaa.
  75                  */
  76                 log(DEBUG,"old nick is new nick, not updating hash (case change only)");
  77                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  78                 int MOD_RESULT = 0;
  79                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  80                 if (MOD_RESULT)
  81                         return;
  82                 if (user->registered == 7)
  83                         WriteCommon(user,"NICK %s",parameters[0]);
  84                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  85                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  86                 return;
  87         }
  88         else
  89         {
  90                 if ((*parameters[0] == ':') && (*(parameters[0]+1) != 0))
  91                 {
  92                         parameters[0]++;
  93                 }
  94                 if (matches_qline(parameters[0]))
  95                 {
  96                         WriteOpers("*** Q-Lined nickname %s from %s!%s@%s: %s",parameters[0],user->nick,user->ident,user->host,matches_qline(parameters[0]));
  97                         WriteServ(user->fd,"432 %s %s :Invalid nickname: %s",user->nick,parameters[0],matches_qline(parameters[0]));
  98                         return;
  99                 }
 100                 if ((Find(parameters[0])) && (Find(parameters[0]) != user))
 101                 {
 102                         WriteServ(user->fd,"433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
 103                         return;
 104                 }
 105         }
 106         if (isnick(parameters[0]) == 0)
 107         {
 108                 WriteServ(user->fd,"432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
 109                 return;
 110         }
 111
 112         if (user->registered == 7)
 113         {
 114                 int MOD_RESULT = 0;
 115                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 116                 if (MOD_RESULT) {
 117                         // if a module returns true, the nick change is silently forbidden.
 118                         return;
 119                 }
 120
 121                 WriteCommon(user,"NICK %s",parameters[0]);
 122
 123         }
 124
 125         strlcpy(oldnick, user->nick, NICKMAX - 1);
 126
 127         /* change the nick of the user in the users_hash */
 128         user = ReHashNick(user->nick, parameters[0]);
 129         /* actually change the nick within the record */
 130         if (!user) return;
 131         if (!user->nick) return;
 132
 133         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 134
 135         log(DEBUG,"new nick set: %s",user->nick);
 136
 137         if (user->registered < 3)
 138         {
 139                 user->registered = (user->registered | 2);
 140                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 141                 // and unless we're lucky we'll get a duff one later on.
 142                 //user->dns_done = (!lookup_dns(user->nick));
 143                 //if (user->dns_done)
 144                 //      log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 145
 146                 if (Config->NoUserDns)
 147                 {
 148                         user->dns_done = true;
 149                 }
 150                 else
 151                 {
 152 #ifdef THREADED_DNS
 153                         // initialize their dns lookup thread
 154                         if (pthread_create(&user->dnsthread, NULL, dns_task, (void *)user) != 0)
 155                         {
 156                                 log(DEBUG,"Failed to create DNS lookup thread for user %s: %s",user->nick, strerror(errno));
 157                         }
 158 #else
 159                         user->dns_done = (!lookup_dns(user->nick));
 160                         if (user->dns_done)
 161                                 log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 162 #endif
 163                 }
 164         }
 165         if (user->registered == 3)
 166         {
 167                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 168                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 169                 //ConnectUser(user,NULL);
 170         }
 171         if (user->registered == 7)
 172         {
 173                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 174         }
 175 }